title: Elevation of the petrous bone caused by hyperplasia of the occipital bone presenting as hemifacial spasm: diagnostic values of magnetic resonance imaging and three-dimensional computed tomographic images in a bone anomaly.
abstract: A case of elevation of the petrous bone due to hyperplasia of the occipital bone presenting as hemifacial spasm is reported. A 44-year-old man sought treatment for twitching of the buccal muscles on the right side that progressed rapidly in severity within 2 weeks of the onset. The anatomical details of the petrous and occipital bones were delineated clearly by computed tomographic scans of a bone window level. Details of the brain stem were shown by magnetic resonance images. The bone anomaly was displayed more realistically by three-dimensional computed tomographic reconstructions. The faithful representation of structures with these radiological studies should be mandatory, to prepare the surgical planning of such a complicated bone anomaly.
authors.affiliation: Department of Neurosurgery, Fukuoka University, Chikushi Hospital, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Tanaka
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Irie
authors.forename: S
authors.initials: S
authors.lastname: Yoshinaga
authors.forename: M
authors.initials: M
authors.lastname: Tomonaga
mesh_terms: D000328:Adult; D005152:Facial Muscles; D006801:Humans; D006965:Hyperplasia; D008279:Magnetic Resonance Imaging; D008297:Male; D009777:Occipital Bone / Q000000981:diagnostic imaging / Q000473:pathology*; D010579:Petrous Bone / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013035:Spasm / Q000209:etiology*; D014057:Tomography, X-Ray Computed / Q000379:methods*